*{
    margin: 0;
    padding: 0;
}

#app{
    width: 400px;
    height: 400px;
    overflow: hidden;
    font-size: 12px;
    line-height: 25px;
    border: 1px solid rebeccapurple;
}
img{
    width: 100%;
    height: 100%;
}
ul li{

}

